CN215496829U

CN215496829U - Wireless networking communication system for battery cluster and wireless networking communication system for energy storage system of wireless networking communication system

Info

Publication number: CN215496829U
Application number: CN202120378789.XU
Authority: CN
Inventors: 王熙涵; 吴晓峰; 冯玟生; 冯志强; 高纪凡
Original assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Current assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2022-01-11
Anticipated expiration: 2031-02-19

Abstract

The utility model provides a wireless networking communication system for a battery cluster and an energy storage system thereof, wherein continuous Bluetooth low-power module BLE communication and conditional WIFI communication are established in one battery cluster, all communication lines CAN be removed in the one battery cluster, when the battery cluster is in a non-working state, Bluetooth low power (BLE) with extremely low power consumption is used for broadcasting, data of each battery cell is transmitted to a battery string management unit BCU in a periodic broadcasting mode, and then transmitted to a superior management unit in a CAN bus mode; when the battery is in a working state, namely the battery is in a charging or discharging state, the working state is switched to a WIFI working state, and data of each battery cell are rapidly transmitted to the battery string management unit BCU in real time. The communication scheme of the conventional energy storage system, the data uploading accuracy and the system response speed are optimized.

Description

Wireless networking communication system for battery cluster and wireless networking communication system for energy storage system of wireless networking communication system

Technical Field

The utility model belongs to the technical field of internal communication of energy storage systems, and particularly relates to a wireless networking communication system of a battery cluster and a wireless networking communication system of the energy storage system.

Background

The key technology of the energy storage system is a battery management system BMS which is a core component of the battery energy storage system and is responsible for collecting information such as voltage, temperature, current and electric quantity of the energy storage battery pack, monitoring the real-time state and analyzing faults, and meanwhile, the battery is subjected to optimized charging and discharging management control through online communication of a communication bus, a PCS and a monitoring and scheduling system. Each group of battery pack of the system is respectively provided with a battery management system, so that the aims of effectively and efficiently using each group of energy storage battery and reasonably allocating the whole battery can be fulfilled. The BMS system generally includes a detection module, an operation module, and a control module. Fig. 1 is a topology diagram of an energy storage system architecture in the prior art, as shown in fig. 1, including: (1) the host computer-battery string management unit BCU is used for collecting CAN 2 bus data of the battery module management unit BMU and forwarding the CAN1 bus to the energy management system EMS; the battery module management unit BMU receives data or commands of the energy management system EMS and forwards the data or commands to the battery module management unit BMU; (2) the slave-battery module management unit BMU is in the state of reporting communication and receiving commands all the time.

On the other hand, the energy storage system is generally a fixed place and is close to the fixed place, and due to the bad interference of various electric fields and magnetic fields when the high-power electric power runs, the communication in the non-shielding mode is unstable. And the cost of shielding communication is too high. The wireless communication mode is in a short distance (within 20 meters), the anti-interference capability is strong, and the appearance mechanism and the construction cost are low. However, the Zigbee transmission rate in the conventional short-distance wireless communication method is low, so that in a large energy storage system, if an emergency occurs, the data collector cannot rapidly collect data of the battery unit for processing, and the power consumption of the WIFI alone for a long time is too large, and similarly, when only the bluetooth module is used for communication, the emergency cannot be responded.

When the energy storage system works, generally, charging and discharging work at about 0.5C, for example, 2 charging and 2 discharging in 1 day, the energy storage system only works for 8 hours, and the energy storage system is in a standby state at other times. But the standby state must monitor the battery information.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a wireless networking communication system for a battery cluster and an energy storage system thereof, which optimizes the communication scheme of the existing energy storage system, realizes the random arrangement of energy storage equipment in an energy storage area, and improves the accuracy of primary equipment data uploading and the system response speed.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a wireless network deployment communication system of battery cluster, includes a plurality of battery cluster, each the battery cluster comprises a plurality of battery module, each contain a plurality of electric core, its characterized in that in the battery module: each battery cluster is internally provided with a plurality of primary management units and a secondary management unit, the primary management unit manages a plurality of battery cells in a battery module, the secondary management unit is in wireless communication with the primary management unit in the battery cluster and is in communication with a superior management unit through a CAN bus, the upper management unit is a three-level management unit positioned outside the battery cluster, each of the first-level management unit and the second-level management unit is provided with a Bluetooth module and a WIFI module, each Bluetooth module comprises a low-power module BLE, the low-power module BLE on the first-level management unit uninterruptedly and periodically broadcasts data of each battery cell, and the low-power module BLE on the second-level management unit uninterruptedly and periodically scans the data broadcasted by the low-power module BLE on the first-level management unit, analyzes the data and transmits the data to the three-level management unit through a CAN bus; under the set condition, the primary management unit and the secondary management unit are switched to a WIFI communication state and realize the rapid data interaction through the WIFI module communication.

Further, the set condition is when the battery cell is in a charging or discharging state.

Further, the primary management unit is a battery module management unit BMU, the secondary management unit is a battery string management unit BCU, and the tertiary management unit is a battery array management unit BAU.

The utility model also provides a wireless networking communication system of the energy storage system, which comprises an energy management system EMS, a three-level management unit and a bidirectional inverter PCS which are in communication connection with the energy management system EMS simultaneously, and a plurality of battery clusters in communication connection with the three-level management unit, wherein the battery clusters are in wireless communication by adopting the wireless networking communication system of the battery clusters.

Furthermore, the three-level management unit is a battery array management unit BAU, the battery array management unit BAU is in communication connection with the energy management system EMS through an RS485, a TCP/IP protocol or a CAN bus, and the battery array management unit BAU is in communication connection with the plurality of secondary management units through the CAN bus.

Further, the secondary management unit is a battery string management unit BCU.

By adopting the wireless networking communication system for the battery clusters, all communication lines CAN be removed from one battery cluster, when the wireless networking communication system is in a non-working state, the Bluetooth (BLE) with extremely low power consumption is used for broadcasting, the data of each battery cell is transmitted to the BCU (battery management unit) in a periodic broadcasting mode, and then transmitted to the upper management unit in a CAN (controller area network) bus mode; when the battery is in a working state, namely the battery is in a charging or discharging state, the working state is switched to a WIFI working state, data of each battery cell are rapidly transmitted to the BCU in real time, a Bluetooth/WIFI communication area is established in a cluster of batteries, the data are interacted in a transmission mode complementary with the WIFI, the communication scheme of the existing energy storage system is optimized, the continuity and the integrity of data collection of the primary management unit and the secondary management unit are improved, and the accuracy of data uploading and the system response speed are improved.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the cost for installing the communication wiring harness is saved;

(2) the energy storage facilities in the energy storage area can be randomly arranged;

(3) the development period of a product development structure is shortened;

(4) the continuity and the integrity of data collection of the primary management unit and the secondary management unit, the accuracy of data uploading and the system response speed are improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

FIG. 1 is a topology diagram of a prior art energy storage system architecture;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Example 1:

as shown in fig. 2, the wireless networking communication system for battery clusters of the present invention is used for communication and data interaction between battery management systems in a battery cluster, and includes more than one (including one) battery cluster, each battery cluster is composed of a plurality of battery modules, each battery module includes a plurality of battery cells, each battery cluster includes a plurality of primary management units and a secondary management unit, each primary management unit manages a plurality of battery cells in a battery module, the secondary management unit wirelessly communicates with the primary management unit in the battery cluster and communicates with a superior management unit through a CAN bus, the superior management unit is a tertiary management unit located outside the battery cluster, each primary management unit and the secondary management unit are provided with a bluetooth module and a WIFI module, each bluetooth module includes a low power module BLE, the low-power-consumption module BLE on the primary management unit broadcasts data of each battery cell uninterruptedly and periodically, and the low-power-consumption module BLE on the secondary management unit scans the data broadcasted by the low-power-consumption module BLE on the primary management unit uninterruptedly and periodically and transmits the data to the tertiary management unit through the CAN bus after performing data analysis. When the battery cell is in a charging or discharging state, the primary management unit and the secondary management unit are switched to a WIFI communication state, and data quick interaction is achieved through WIFI module communication.

The primary management unit is a battery module management unit BMU, the secondary management unit is a battery string management unit BCU, and the tertiary management unit is a battery array management unit BAU.

In this embodiment, the outside of one battery cluster is sealed by metal, and the inside of the battery cluster performs communication and data interaction in the following wireless manner: when the battery module management unit BMU is in a non-working state, the battery module management unit BMU continuously broadcasts and sends data of each battery cell through the low-power-consumption module BLE, the battery string management unit BCU continuously scans each battery cell data periodically broadcasted by the low-power-consumption module BLE of each battery module management unit BMU at low frequency through the low-power-consumption module BLE, the battery cell data is transmitted to an upper management unit through a CAN bus after being subjected to data analysis, after the battery string management unit BCU receives a working state switching instruction of the upper management unit, the battery module management unit BCU is informed of entering a working state through Bluetooth data broadcast by the Bluetooth module, a WIFI module of the battery string management unit BCU is activated, and after the battery module management unit BMU enters the working state, the battery module management unit BMU is activated and transmits the data of each battery cell to the battery string management unit BCU rapidly in real time through the WIFI module. In the present invention, the "operating state" refers to a charging or discharging state of the battery.

Example 2:

the utility model also provides a wireless networking communication system of the energy storage system, which comprises an energy management system EMS, a battery array management unit BAU and a bidirectional inverter PCS which are in communication connection with the energy management system EMS simultaneously, and a plurality of battery clusters in communication connection with the battery array management unit BAU, wherein the battery clusters are in wireless communication by adopting the wireless networking communication system of the battery clusters in the embodiment 1.

The battery array management unit BAU is in communication connection with the energy management system EMS through an RS485 protocol, a TCP/IP protocol or a CAN bus, and the battery array management unit BAU is in communication connection with the battery string management units BCUs through the CAN bus.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the utility model.

Claims

1. The utility model provides a wireless network deployment communication system of battery cluster, includes a plurality of battery cluster, each the battery cluster comprises a plurality of battery module, each contain a plurality of electric core, its characterized in that in the battery module: each battery cluster is internally provided with a plurality of primary management units and a secondary management unit, the primary management unit manages a plurality of battery cells in a battery module, the secondary management unit is in wireless communication with the primary management unit in the battery cluster and is in communication with a superior management unit through a CAN bus, the upper management unit is a three-level management unit positioned outside the battery cluster, each of the first-level management unit and the second-level management unit is provided with a Bluetooth module and a WIFI module, each Bluetooth module comprises a low-power module BLE, the low-power module BLE on the first-level management unit uninterruptedly and periodically broadcasts data of each battery cell, and the low-power module BLE on the second-level management unit uninterruptedly and periodically scans the data broadcasted by the low-power module BLE on the first-level management unit, analyzes the data and transmits the data to the three-level management unit through a CAN bus; under the set condition, the primary management unit and the secondary management unit are switched to a WIFI communication state and realize the rapid data interaction through the WIFI module communication.

2. The wireless networking communication system of claim 1, wherein: the set condition is when the battery cell is in a charging or discharging state.

3. The wireless networking communication system of claim 1, wherein: the primary management unit is a battery module management unit BMU, the secondary management unit is a battery string management unit BCU, and the tertiary management unit is a battery array management unit BAU.

4. The utility model provides an energy storage system wireless network deployment communication system which characterized in that: the wireless networking system comprises an energy management system EMS, a three-level management unit and a bidirectional inverter PCS which are in communication connection with the energy management system EMS simultaneously, and a plurality of battery clusters which are in communication connection with the three-level management unit, wherein the battery clusters are in wireless communication by adopting the wireless networking communication system of the battery clusters as set forth in any one of claims 1-3.

5. The energy storage system wireless networking communication system of claim 4, wherein: the three-level management unit is a battery array management unit BAU, the battery array management unit BAU is in communication connection with an energy management system EMS through an RS485 protocol, a TCP/IP protocol or a CAN bus, and the battery array management unit BAU is in communication connection with the plurality of two-level management units through the CAN bus.

6. The energy storage system wireless networking communication system of claim 5, wherein: and the secondary management unit is a battery string management unit BCU.